Sifter



J. RIEMENSCHNEIDER.

slFTER.

APPLICATION FILED IAN. I3, 1921. 1,409,578.

Patented Mar. 14, 1922. Z 2 SHEETS-SHEET l. 44;? #2

a /fc/a /ff/ m/Sv/ Julius REmEnS c'hneier J. RIEMENSCHNEIDER.

SIFTER.

. APPLICATION F|LED,1AN.'13.1921.

Patented Mar. 14, 1922.

2 SHEETS-SHEET 2.

Julius Riemens :h1-leider' UNITED STATES JULIUS RIEMENSCHNEIDER, OF MILWAUKEE, WISCONSIN.

SIFTER.

Specification of Letters Patent.

Paten-'ted Mar. 14, 1922.

Application filed January 13, 1921. Serial No. 436,896.

To ZZ wlw/1n #may concern.

Be it known that I, JULiUs limitensoHNnrDnn, acitizen of. the United States, and resident of Milwaukee, inthe county of Milwaukee and State of Tisconsim have invented certain new and.` useful Improvements in Sitters;` andv I do hereby declare that the following is a full, clear, and exact description thereof.

This invention relates to improvements in sitters, and is more especially adapted for use in bakeries or other establishments wherein it is necessary to sifft large quantities o'fliour, meal and the like.

One of the principal objects oi the invention is to provide a device of this` character which may bereasily moved from one place to another, and which may be readily adjusted for use in connection with a dough mixer, or the like.y

Another important object of the invention is to provide means whereby the lumps may irst be broken up and the material subsequently conveyed to a sieve of finer mesh,

which separates all the impurities and ioreign matter from the same.

A further object ottheinvention is to provide means for adjustingthe feed so that greater or less amounts of material may be fedV to the sifter, or the feed may be cut oif altogether while the sieve is'beingy operated.

Other objects ,andE advantages will be apparent as the description proceeds, and it is, of course, to be understood that my inventionis not limited to the precise structure herein shown and described, but comprises all modifications which may fall within the scope ofthe appended claims.

In the accompanying drawings forming a part of the specification, Figure 1 is a longitudinal sectional view through theI sitter mechanism with the supporting means shown in elevation.

Figure 2 is a vertical transversesection on the line 2-2 of'bigure 1.

Figure 3 is a vertical transverse section on thek line 34-3 ofFigure 1, and

Figure 4. is a sectional detail showing the manner in which the sieve is mounted on the spiders supporting the same.

The device of which my invention forms a part, comprises a truck 10, on which are mounted the vertical standards 11 which, at their upper ends, carry the cross heads 12. These crossheads are provided with suitable braces 12a. From the corners of the truck rise rods 13 on which telescope the hollow sha its 14 which carry the sifting mechanism. Extending' transverselyv between the cross heads 12, is a rotatably mounted windlass 15 which is actuated by the crank 16 and held in adjusted position by the pa-wl and ratchet 1T. Around the windlassV 15 are wound the flexible members 18, which. at their lower ends. areconnected to the angle bars 19. which are rigidly `connected to4 the hollow shafts 14'by suitable means, such as the U- bolts 20.

As the windlass is wound up the hollow shafts 14 are raised vertically through the sleeves 21. which are carried on the ends ol the cross heads 12, and the sifting mechanismY is thus raised asl desired. i*

Handles 22 project from vone side of the supporting fra-me forconvenience in moving the truck from place to place. The vertical hollow shafts 14 carry at their upper ends the bed 23. in which is mounted the trough 24, in which is rotatably mounted a screw conveyor 25. Above the trough is a hopper 26, the downwardly converging` sides of which are received within the upper edges of the trough. Angle irons 2T serve to support the hopper in xed relation to the trough, said angle irons 27 resting on the rims 28.

The upper edge of the hopper is held in stable position by means of the tie rods 29, which are adjustably connected to the bed V23 by the nuts 30., A rotary cylindri al sieve 70 is mounted within the lower part of the hopper, and is carried on the sha't't '71 which is rotatably mounted in the bars 32 and 33 supported' from the bed 23.

The sha-ft 71 is provided' with ay hand crank 34, for rotating the same and is f-ounected bythe spur gearing 35 to the rotary screw conveyor 25.

Above the rotary sieve 70 al. each end are locatedv the V-shaped shoulders', on which rides the hinged cut-olf members 37 and 3S, which are hinged together at 39.v Rods 40 extend from the hinged member 39- to the mouth of the hopper, where they extend through the channel irons 41 extending across the mouth of the hopper. The upper ends of the rods 40 are connected by the cross head 42, which is pivotally connected to the lever 43, which is fulcrumed at 44 on the channel bar.

Thus it will be seen that by moving the lever 43, the cross head 42 may be raised and lowered, thus causing the edges of the members 37 and 38 to slide on the shoulders' 36 and cut ott or regulate the amount of material fed to the sieve 70.

Y The bed 23 is extended at the delivery side oit the structure to form the auxiliary bed from which is supported the outlet chute 46 which is adapted to be connected with a dough mixer or bag, or other receptacle :tor receiving sitted flour. The chute 46 is provided at its upper end with the flange 47 tor retaining the saine in position, On the bed supported above the chute is the cylindrical housing 48, which is provided with the angle irons 49 which rest on the fia-nge 47. The

vshaft 7l is extended through the housing 48, and its outer end isjournaled at 50 inthe auxiliary-bed 45.

Carried by the outer end of the sha'tt are spiders 5l and 52, which support the annular lbearing rings 53 and 54, on which is mounted the cylindrical sieve 55. Since it may be desirable to remove the screen 55 to substitute another of different mesh, the saine is made removable by providing the annular rings 53and 54 with pins56 as shown in Figure 4 which engage in holes provided in the screen.

Connected with the annular rods 53 and 54 are the spiral ribs 57 which help to supportthe screen 55, and also as the screen rotates they direct the material therein toward 'the other end of the screen. The waste matter which fails to pass through the screen as the screen is rotated slides towards the lower ends of the ribs, and as the ribs are carried Vup over the axis this matter drops into the spout 58,'which is mounted within the screen and delivers it to the receptacle 59 supported at the outer end of the same.

The end ol' the shaft/Iltis 'also provided with the cam wheel 60 which, as the shaft and screens rotate, engages' with the pinvGl ,-zriicl'agitate the screen 55 and the material within it.

In the operation of the device, the; Vflourv or other material to be siftedis placed in Y the hopper 26. By raising the `hinge 89, the

,sifted after the manner hereinbefore described.A i Y Y i inname The material which is ,suitableto bensed for baking then dropsthrough the sieve and through the outlet 45 into the dough .mixer or other receptacle which is provided tor that purpose. The coarse material and foreign matter which are separated 'from the flour are then delivered by the ribs 5S and spout 58 y into the receptacle 59.

VThus it will be seen that have provided a sitter which may be conveniently used iii bakeries and the like where it is desirable to sift large quantities in the -quiclrest and most convenient manner. n

It will ,also be seen that by removing the nuts 30 the hopper may be li'tted oil. The sliat't 7l and thesieves carried thereby may then be readily removed from the bearings 32, and 50 tor cleaning or tor repairs.

l claim as my invention: y

fl. ln a device oi' lthe character described, a t' "aine, al cylindrical. sieve rotatably inounted therein, a hopper located above the sieve for discharging material onto the outer surface thereof, inea-ns for adjustably controlling the rate of discharge of mat rial from the hopper to the sieve, a second cylindrical sieve mounted to rotate simultaneously with the first sieve, and a conveyor for receiving material that has passed through the first sieve and delivering it to the interior ot the secondsieve.

2. In a device oit the character described, a trame, a shaft rotatably mounted therein,

'two cylindrical sieves carried by said shalt to rotate therewith, a rotary screw conveyor geared to said shaft andllocated ,toireceive material that passes through the lirst sieve `tor collecting the material which passes Athrough the sieve.

3. n a device ont tlie'character .deseribech a hopper, a rotary cylindrical sieve mounted in the bottom thereof, a pairV of eut-ot members hinged together, and'normally ei:`

tendingjacross V.thehopper above the sieve,

suitablefguides on which thezimeinbers are `,slidably,supported and means flior i raising the hinge to @draw the cut-oli" Vmembers away vfrom the sides oi the liopperto permit materialin the hoppeiato pass into the Ysieve ln testimony that l claim the foregoing I havediereunto setmyyhand at lvlilwaukee,

in the ,county of h/Iilwaulree. and State'ot fldiseonsin.l f Y JULiUsninMENsoi-in'ninna.

ini n 

